Being the root user of the Android operating system that is running on the Samsung Galaxy Express 2 smartphone means you can now make changes to the software. Many apps require making these changes, and there are other things like custom ROMs that improves the appearance and features of your operating system. Rooting the Android operating system running on the Galaxy Express smartphone means being able to customize the device in thousands of different ways.

REQUIREMENTS

• Chainfire had created the CF-Auto-Root tool for the Galaxy Express 2 SM-G3815 when he was running the KOT49H.G3815XXUCNH1 firmware build number. That does not mean you need to be running that same firmware build number on your device. Chainfire just shares the firmware build number he was running because he says that some Samsung devices do not boot old images.
• You must have a Windows operating system running on the computer that you are using the guide for the Odin flashing application to work. The Samsung developers made the Odin flashing application to work on Windows PCs only.

BEFORE WE BEGIN

• You need to unlock the Developer Options menu on the Samsung Galaxy Express 2 smartphone before you can use this guide because you need to turn on the USB Debugging. You can unlock it by tapping on the Menu > Settings > About Device > Build Number. Continually tap on the build number until the Android OS gives you a message on the display that says you are using the device as a developer and then continue with the next step.
• Now it is time to enable the USB Debugging Mode from the Developer Options menu on the Galaxy Express 2 smartphone. We do that by heading back to the home screen and then tapping on the Menu > Settings > Developer Options > USB Debugging. Once you have checked the mark so that it is no longer empty, leave the Developer Options menu, and the Android software remembers your preferences.
• Install the Samsung USB Drivers on the computer before you begin so that they can help your smartphone be detected by the flashing application we are using to root the device.

HOW TO ROOT SAMSUNG GALAXY EXPRESS 2 RUNNING ON ANDROID 4.4.2 KITKAT

1. Download the CF-Auto-Root tool for the Samsung Galaxy Express 2 on Android 4.4.2 from here.
2. Extract the rooting file to the desktop of the computer and you get the rooting file and the Odin flashing application on the desktop.
3. Run the Samsung USB Drivers on the computer so that your device can be detected by the Odin flashing tool when you connect it to the computer.
4. Boot the Samsung Galaxy Express 2 smartphone into the download mode and then connect it to the computer with the USB cable.
5. Double-click the Odin flashing tool’s executable file that is on the desktop so that the flashing tool opens and you can see the user interface.
6. Do not make any changes from the default settings you get from the flashing tool user interface or you might end up with lost data.
7. Click the AP button from the Odin user interface and then browse through to the desktop location and upload the rooting file to this place.
8. Select the start button and wait for the rooting to complete.

In conclusion, that is how to root Samsung Galaxy Express 2 SM-G3815 smartphones when they are running on the Android 4.4.2 KitKat software updates by using the CF-Auto-Root tool from Chainfire. You should see a message on the display of the smartphone that says it is going to reboot in ten seconds and then a green pass box appearing from the Odin flashing app user interface on the computer. That is when you know you can unplug from the computer and enjoy your rooted phone!